sensors Mode-S transponder
A3D04B
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N345EF · CIRRUS SR-20 · operated by VENBRO HOLDINGS LLC
- Hex
- A3D04B
- Octal
- 50750113
- Decimal
- 10,735,691
- Country
- US
- Tail
- N345EF
- Type
- SR20
- Flights observed
- 51
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- Jul 26, 18:20 UTC
Last known position
Country allocation
The ICAO 24-bit address A3D04B falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.
Callsign history 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| N345EF | - | 51 | 2026-07-26 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | N345EF | - | Jul 26, 18:05 UTC | Jul 26, 18:20 UTC | 15m |
| 2026-07-26 | N345EF | - | Jul 26, 16:50 UTC | Jul 26, 17:35 UTC | 45m |
| 2026-07-26 | N345EF | - | Jul 26, 14:10 UTC | Jul 26, 14:55 UTC | 45m |
| 2026-07-25 | N345EF | - | Jul 25, 20:10 UTC | Jul 25, 20:55 UTC | 45m |
| 2026-07-24 | N345EF | - | Jul 24, 17:10 UTC | Jul 24, 17:45 UTC | 35m |
| 2026-07-24 | N345EF | - | Jul 24, 12:15 UTC | Jul 24, 13:00 UTC | 45m |
| 2026-07-23 | N345EF | - | Jul 23, 22:25 UTC | Jul 23, 22:55 UTC | 30m |
| 2026-07-23 | N345EF | - | Jul 23, 19:40 UTC | Jul 23, 21:20 UTC | 1h 40m |
| 2026-07-20 | N345EF | - | Jul 20, 16:35 UTC | Jul 20, 17:15 UTC | 40m |
| 2026-07-20 | N345EF | - | Jul 20, 15:00 UTC | Jul 20, 15:55 UTC | 55m |
| 2026-07-20 | N345EF | - | Jul 20, 13:20 UTC | Jul 20, 13:50 UTC | 30m |
| 2026-07-14 | N345EF | - | Jul 14, 21:40 UTC | Jul 14, 22:20 UTC | 40m |
| 2026-07-13 | N345EF | CDW → CDW | Jul 13, 19:10 UTC | Jul 13, 19:55 UTC | 45m |
| 2026-07-12 | N345EF | - | Jul 12, 14:25 UTC | Jul 12, 15:35 UTC | 1h 10m |
| 2026-07-11 | N345EF | - | Jul 11, 14:30 UTC | Jul 11, 16:05 UTC | 1h 35m |
| 2026-07-01 | N345EF | - | Jul 1, 23:15 UTC | Jul 2, 00:20 UTC | 1h 5m |
| 2026-07-01 | N345EF | - | Jul 1, 20:40 UTC | Jul 1, 21:05 UTC | 25m |
| 2026-07-01 | N345EF | - | Jul 1, 16:55 UTC | Jul 1, 18:10 UTC | 1h 15m |
| 2026-06-29 | N345EF | - | Jun 29, 16:44 UTC | Jun 29, 17:45 UTC | 1h 0m |
| 2026-06-27 | N345EF | CDW → CDW | Jun 27, 19:24 UTC | Jun 27, 20:39 UTC | 1h 15m |
| 2026-06-21 | N345EF | - | Jun 21, 14:59 UTC | Jun 21, 15:15 UTC | 15m |
| 2026-06-21 | N345EF | - | Jun 21, 14:05 UTC | Jun 21, 14:24 UTC | 20m |
| 2026-06-03 | N345EF | - | Jun 3, 22:20 UTC | Jun 3, 23:25 UTC | 1h 5m |
| 2026-06-01 | N345EF | - | Jun 1, 15:20 UTC | Jun 1, 15:50 UTC | 30m |
| 2026-06-01 | N345EF | - | Jun 1, 14:20 UTC | Jun 1, 14:40 UTC | 20m |
| 2026-05-31 | N345EF | - | May 31, 15:00 UTC | May 31, 16:20 UTC | 1h 20m |
| 2026-05-30 | N345EF | - | May 30, 23:30 UTC | May 31, 00:55 UTC | 1h 25m |
| 2026-05-30 | N345EF | - | May 30, 22:50 UTC | May 30, 23:25 UTC | 35m |
| 2026-05-18 | N345EF | - | May 18, 11:35 UTC | May 18, 12:40 UTC | 1h 5m |
| 2026-05-17 | N345EF | - | May 17, 15:45 UTC | May 17, 16:40 UTC | 55m |
| 2026-05-16 | N345EF | - | May 16, 19:30 UTC | May 16, 20:40 UTC | 1h 10m |
| 2026-05-16 | N345EF | - | May 16, 18:05 UTC | May 16, 18:20 UTC | 15m |
| 2026-05-16 | N345EF | - | May 16, 16:55 UTC | May 16, 17:25 UTC | 30m |
| 2026-05-16 | N345EF | CDW → CDW | May 16, 14:46 UTC | May 16, 16:00 UTC | 1h 15m |
| 2026-05-13 | N345EF | LEB → CDW | May 13, 22:00 UTC | May 14, 00:00 UTC | 2h 0m |
| 2026-05-13 | N345EF | - | May 13, 19:35 UTC | May 13, 21:05 UTC | 1h 30m |
| 2026-05-12 | N345EF | - | May 12, 14:25 UTC | May 12, 15:05 UTC | 40m |
| 2026-05-03 | N345EF | - | May 3, 15:45 UTC | May 3, 16:05 UTC | 20m |
| 2026-05-03 | N345EF | - | May 3, 14:05 UTC | May 3, 14:35 UTC | 30m |
| 2026-05-02 | N345EF | - | May 2, 15:10 UTC | May 2, 16:25 UTC | 1h 15m |
| 2026-04-30 | N345EF | - | Apr 30, 17:45 UTC | Apr 30, 18:20 UTC | 35m |
| 2026-04-28 | N345EF | - | Apr 28, 21:10 UTC | Apr 28, 22:10 UTC | 1h 0m |
| 2026-04-28 | N345EF | - | Apr 28, 15:45 UTC | Apr 28, 16:10 UTC | 25m |
| 2026-04-27 | N345EF | - | Apr 27, 14:05 UTC | Apr 27, 14:30 UTC | 25m |
| 2026-04-26 | N345EF | - | Apr 26, 19:25 UTC | Apr 26, 20:25 UTC | 1h 0m |
| 2026-04-26 | N345EF | - | Apr 26, 14:15 UTC | Apr 26, 15:30 UTC | 1h 15m |
| 2026-04-25 | N345EF | - | Apr 25, 11:45 UTC | Apr 25, 12:25 UTC | 40m |
| 2026-04-24 | N345EF | - | Apr 24, 19:25 UTC | Apr 24, 20:50 UTC | 1h 25m |
| 2026-04-23 | N345EF | - | Apr 23, 12:05 UTC | Apr 23, 13:10 UTC | 1h 5m |
| 2026-04-18 | N345EF | - | Apr 18, 19:25 UTC | Apr 18, 19:40 UTC | 15m |
About Mode-S
A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.
Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.
Prefer a tail-number view? See the N345EF page for operator, model, and routing details .